Construction de l'évacuateur de crues Opinaca

• Published in: Canadian Journal of Civil Engineering
• Main Author: Massiéra, Michel
• Format: Article in Journal/Newspaper
• Language: French
• Published: Canadian Science Publishing 1986
• Subjects: General Environmental Science; Civil and Structural Engineering; Eastmain; La Grande River; James Bay
• Online Access: http://dx.doi.org/10.1139/l86-082; http://www.nrcresearchpress.com/doi/pdf/10.1139/l86-082

The Opinaca spillway is one of the concrete structures of the EOL (Eastmain – Opinaca – La Grande) project within the "La Grande" hydroelectric complex at James Bay, Quebec. Three rivers were diverted to the La Grande River to increase the hydroelectric potential of the LG 2 power plant. Opinaca spillway is a reinforced concrete structure 28.7 m wide and 46.6 m long with intake and restitution channels excavated in the rock. This paper describes the different construction phases of the spillway with emphasis on rock excavation and support, grouting, concreting, and quality control. Key words: blasting, bolting, concreting, dowel, excavation, grouting, presplitting, rock, shotcrete, spillway.